viewpager

1 files changed, 437 insertions, 0 deletions

diff --git a/vdrmanager/src/com/viewpagerindicator/CirclePageIndicator.java b/vdrmanager/src/com/viewpagerindicator/CirclePageIndicator.java
new file mode 100644
index 0000000..19d4ee5
--- /dev/null
+++ b/vdrmanager/src/com/viewpagerindicator/CirclePageIndicator.java
@@ -0,0 +1,437 @@
+/*
+ * Copyright (C) 2011 Patrik Akerfeldt
+ * Copyright (C) 2011 Jake Wharton
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.viewpagerindicator;
+
+import de.bjusystems.vdrmanager.R;
+import android.content.Context;
+import android.content.res.Resources;
+import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Paint.Style;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.support.v4.view.ViewPager;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.View;
+
+/**
+ * Draws circles (one for each view). The current view position is filled and
+ * others are only stroked.
+ */
+public class CirclePageIndicator extends View implements PageIndicator {
+    public static final int HORIZONTAL = 0;
+    public static final int VERTICAL = 1;
+
+    private float mRadius;
+    private final Paint mPaintStroke;
+    private final Paint mPaintFill;
+    private ViewPager mViewPager;
+    private ViewPager.OnPageChangeListener mListener;
+    private int mCurrentPage;
+    private int mSnapPage;
+    private int mCurrentOffset;
+    private int mScrollState;
+    private int mPageSize;
+    private int mOrientation;
+    private boolean mCentered;
+    private boolean mSnap;
+
+
+    public CirclePageIndicator(Context context) {
+        this(context, null);
+    }
+
+    public CirclePageIndicator(Context context, AttributeSet attrs) {
+        this(context, attrs, R.attr.circlePageIndicatorStyle);
+    }
+
+    public CirclePageIndicator(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+
+        //Load defaults from resources
+        final Resources res = getResources();
+        final int defaultFillColor = res.getColor(R.color.default_circle_indicator_fill_color);
+        final int defaultOrientation = res.getInteger(R.integer.default_circle_indicator_orientation);
+        final int defaultStrokeColor = res.getColor(R.color.default_circle_indicator_stroke_color);
+        final float defaultStrokeWidth = res.getDimension(R.dimen.default_circle_indicator_stroke_width);
+        final float defaultRadius = res.getDimension(R.dimen.default_circle_indicator_radius);
+        final boolean defaultCentered = res.getBoolean(R.bool.default_circle_indicator_centered);
+        final boolean defaultSnap = res.getBoolean(R.bool.default_circle_indicator_snap);
+
+        //Retrieve styles attributes
+        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CirclePageIndicator, defStyle, R.style.Widget_CirclePageIndicator);
+
+        mCentered = a.getBoolean(R.styleable.CirclePageIndicator_centered, defaultCentered);
+        mOrientation = a.getInt(R.styleable.CirclePageIndicator_orientation, defaultOrientation);
+        mPaintStroke = new Paint(Paint.ANTI_ALIAS_FLAG);
+        mPaintStroke.setStyle(Style.STROKE);
+        mPaintStroke.setColor(a.getColor(R.styleable.CirclePageIndicator_strokeColor, defaultStrokeColor));
+        mPaintStroke.setStrokeWidth(a.getDimension(R.styleable.CirclePageIndicator_strokeWidth, defaultStrokeWidth));
+        mPaintFill = new Paint(Paint.ANTI_ALIAS_FLAG);
+        mPaintFill.setStyle(Style.FILL);
+        mPaintFill.setColor(a.getColor(R.styleable.CirclePageIndicator_fillColor, defaultFillColor));
+        mRadius = a.getDimension(R.styleable.CirclePageIndicator_radius, defaultRadius);
+        mSnap = a.getBoolean(R.styleable.CirclePageIndicator_snap, defaultSnap);
+
+        a.recycle();
+    }
+
+
+    public void setCentered(boolean centered) {
+        mCentered = centered;
+        invalidate();
+    }
+
+    public boolean isCentered() {
+        return mCentered;
+    }
+
+    public void setFillColor(int fillColor) {
+        mPaintFill.setColor(fillColor);
+        invalidate();
+    }
+
+    public int getFillColor() {
+        return mPaintFill.getColor();
+    }
+
+    public void setOrientation(int orientation) {
+        switch (orientation) {
+            case HORIZONTAL:
+            case VERTICAL:
+                mOrientation = orientation;
+                updatePageSize();
+                requestLayout();
+                break;
+
+            default:
+                throw new IllegalArgumentException("Orientation must be either HORIZONTAL or VERTICAL.");
+        }
+    }
+
+    public int getOrientation() {
+        return mOrientation;
+    }
+
+    public void setStrokeColor(int strokeColor) {
+        mPaintStroke.setColor(strokeColor);
+        invalidate();
+    }
+
+    public int getStrokeColor() {
+        return mPaintStroke.getColor();
+    }
+
+    public void setStrokeWidth(float strokeWidth) {
+        mPaintStroke.setStrokeWidth(strokeWidth);
+        invalidate();
+    }
+
+    public float getStrokeWidth() {
+        return mPaintStroke.getStrokeWidth();
+    }
+
+    public void setRadius(float radius) {
+        mRadius = radius;
+        invalidate();
+    }
+
+    public float getRadius() {
+        return mRadius;
+    }
+
+    public void setSnap(boolean snap) {
+        mSnap = snap;
+        invalidate();
+    }
+
+    public boolean isSnap() {
+        return mSnap;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see android.view.View#onDraw(android.graphics.Canvas)
+     */
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+
+        int longSize;
+        int longPaddingBefore;
+        int longPaddingAfter;
+        int shortPaddingBefore;
+        if (mOrientation == HORIZONTAL) {
+            longSize = getWidth();
+            longPaddingBefore = getPaddingLeft();
+            longPaddingAfter = getPaddingRight();
+            shortPaddingBefore = getPaddingTop();
+        } else {
+            longSize = getHeight();
+            longPaddingBefore = getPaddingTop();
+            longPaddingAfter = getPaddingBottom();
+            shortPaddingBefore = getPaddingLeft();
+        }
+
+        final int count = mViewPager.getAdapter().getCount();
+        final float threeRadius = mRadius * 3;
+        final float shortOffset = shortPaddingBefore + mRadius;
+        float longOffset = longPaddingBefore + mRadius;
+        if (mCentered) {
+            longOffset += ((longSize - longPaddingBefore - longPaddingAfter) / 2.0f) - ((count * threeRadius) / 2.0f);
+        }
+
+        float dX;
+        float dY;
+
+        //Draw stroked circles
+        for (int iLoop = 0; iLoop < count; iLoop++) {
+            float drawLong = longOffset + (iLoop * threeRadius);
+            if (mOrientation == HORIZONTAL) {
+                dX = drawLong;
+                dY = shortOffset;
+            } else {
+                dX = shortOffset;
+                dY = drawLong;
+            }
+            canvas.drawCircle(dX, dY, mRadius, mPaintStroke);
+        }
+
+        //Draw the filled circle according to the current scroll
+        float cx = (mSnap ? mSnapPage : mCurrentPage) * threeRadius;
+        if (!mSnap && (mPageSize != 0)) {
+            cx += (mCurrentOffset * 1.0f / mPageSize) * threeRadius;
+        }
+        if (mOrientation == HORIZONTAL) {
+            dX = longOffset + cx;
+            dY = shortOffset;
+        } else {
+            dX = shortOffset;
+            dY = longOffset + cx;
+        }
+        canvas.drawCircle(dX, dY, mRadius, mPaintFill);
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        if (event.getAction() == MotionEvent.ACTION_DOWN) {
+            final int count = mViewPager.getAdapter().getCount();
+            final int longSize = (mOrientation == HORIZONTAL) ? getWidth() : getHeight();
+            final float halfLongSize = longSize / 2;
+            final float halfCircleLongSize = (count * 3 * mRadius) / 2;
+            final float pointerValue = (mOrientation == HORIZONTAL) ? event.getX() : event.getY();
+
+            if ((mCurrentPage > 0) && (pointerValue < halfLongSize - halfCircleLongSize)) {
+                setCurrentItem(mCurrentPage - 1);
+                return true;
+            } else if ((mCurrentPage < count - 1) && (pointerValue > halfLongSize + halfCircleLongSize)) {
+                setCurrentItem(mCurrentPage + 1);
+                return true;
+            }
+        }
+
+        return super.onTouchEvent(event);
+    }
+
+    public void setViewPager(ViewPager view) {
+        if (view.getAdapter() == null) {
+            throw new IllegalStateException("ViewPager does not have adapter instance.");
+        }
+        mViewPager = view;
+        mViewPager.setOnPageChangeListener(this);
+        updatePageSize();
+        invalidate();
+    }
+
+    private void updatePageSize() {
+        if (mViewPager != null) {
+            mPageSize = (mOrientation == HORIZONTAL) ? mViewPager.getWidth() : mViewPager.getHeight();
+        }
+    }
+
+    public void setViewPager(ViewPager view, int initialPosition) {
+        setViewPager(view);
+        setCurrentItem(initialPosition);
+    }
+
+
+    public void setCurrentItem(int item) {
+        if (mViewPager == null) {
+            throw new IllegalStateException("ViewPager has not been bound.");
+        }
+        mViewPager.setCurrentItem(item);
+        mCurrentPage = item;
+        invalidate();
+    }
+
+
+    public void onPageScrollStateChanged(int state) {
+        mScrollState = state;
+
+        if (mListener != null) {
+            mListener.onPageScrollStateChanged(state);
+        }
+    }
+
+   
+    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+        mCurrentPage = position;
+        mCurrentOffset = positionOffsetPixels;
+        updatePageSize();
+        invalidate();
+
+        if (mListener != null) {
+            mListener.onPageScrolled(position, positionOffset, positionOffsetPixels);
+        }
+    }
+
+
+    public void onPageSelected(int position) {
+        if (mSnap || mScrollState == ViewPager.SCROLL_STATE_IDLE) {
+            mCurrentPage = position;
+            mSnapPage = position;
+            invalidate();
+        }
+
+        if (mListener != null) {
+            mListener.onPageSelected(position);
+        }
+    }
+
+
+    public void setOnPageChangeListener(ViewPager.OnPageChangeListener listener) {
+        mListener = listener;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see android.view.View#onMeasure(int, int)
+     */
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        if (mOrientation == HORIZONTAL) {
+            setMeasuredDimension(measureLong(widthMeasureSpec), measureShort(heightMeasureSpec));
+        } else {
+            setMeasuredDimension(measureShort(widthMeasureSpec), measureLong(heightMeasureSpec));
+        }
+    }
+
+    /**
+     * Determines the width of this view
+     *
+     * @param measureSpec
+     *            A measureSpec packed into an int
+     * @return The width of the view, honoring constraints from measureSpec
+     */
+    private int measureLong(int measureSpec) {
+        int result = 0;
+        int specMode = MeasureSpec.getMode(measureSpec);
+        int specSize = MeasureSpec.getSize(measureSpec);
+
+        if (specMode == MeasureSpec.EXACTLY) {
+            //We were told how big to be
+            result = specSize;
+        } else {
+            //Calculate the width according the views count
+            final int count = mViewPager.getAdapter().getCount();
+            result = (int)(getPaddingLeft() + getPaddingRight()
+                    + (count * 2 * mRadius) + (count - 1) * mRadius + 1);
+            //Respect AT_MOST value if that was what is called for by measureSpec
+            if (specMode == MeasureSpec.AT_MOST) {
+                result = Math.min(result, specSize);
+            }
+        }
+        return result;
+    }
+
+    /**
+     * Determines the height of this view
+     *
+     * @param measureSpec
+     *            A measureSpec packed into an int
+     * @return The height of the view, honoring constraints from measureSpec
+     */
+    private int measureShort(int measureSpec) {
+        int result = 0;
+        int specMode = MeasureSpec.getMode(measureSpec);
+        int specSize = MeasureSpec.getSize(measureSpec);
+
+        if (specMode == MeasureSpec.EXACTLY) {
+            //We were told how big to be
+            result = specSize;
+        } else {
+            //Measure the height
+            result = (int)(2 * mRadius + getPaddingTop() + getPaddingBottom() + 1);
+            //Respect AT_MOST value if that was what is called for by measureSpec
+            if (specMode == MeasureSpec.AT_MOST) {
+                result = Math.min(result, specSize);
+            }
+        }
+        return result;
+    }
+
+    @Override
+    public void onRestoreInstanceState(Parcelable state) {
+        SavedState savedState = (SavedState)state;
+        super.onRestoreInstanceState(savedState.getSuperState());
+        mCurrentPage = savedState.currentPage;
+        mSnapPage = savedState.currentPage;
+        requestLayout();
+    }
+
+    @Override
+    public Parcelable onSaveInstanceState() {
+        Parcelable superState = super.onSaveInstanceState();
+        SavedState savedState = new SavedState(superState);
+        savedState.currentPage = mCurrentPage;
+        return savedState;
+    }
+
+    static class SavedState extends BaseSavedState {
+        int currentPage;
+
+        public SavedState(Parcelable superState) {
+            super(superState);
+        }
+
+        private SavedState(Parcel in) {
+            super(in);
+            currentPage = in.readInt();
+        }
+
+        @Override
+        public void writeToParcel(Parcel dest, int flags) {
+            super.writeToParcel(dest, flags);
+            dest.writeInt(currentPage);
+        }
+
+        public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
+      
+            public SavedState createFromParcel(Parcel in) {
+                return new SavedState(in);
+            }
+
+            public SavedState[] newArray(int size) {
+                return new SavedState[size];
+            }
+        };
+    }
+}